Three-Dimensional Thermal Analysis of 18-Core Photonic Crystal Fiber Lasers  

作　　者：ZHENG Yi-Bo YAO Jian-Quan ZHANG Lei WANG Yuan WEN Wu-Qi JING Lei DI Zhi-Gang 郑一博;姚建铨;张磊;王远;温午麒;景磊;邸志刚(Institute of Laser&Otpoelectronics,College of Precision Instruments and Opto-Electronic Engineering,Key Laboratory of Opto-electronics Information and Technical Science(Ministry of Education),Tianjin University,Tianjin 300072;Hebei Key Laboratory of Optoelectronic Information and Geo-detection Technology,Shijiazhuang University of Economics,Shijiazhuang 050031;The College of Gems and Materials Technology,Shijiazhuang University of Economics,Shijiazhuang 050031)

机构地区：[1]Institute of Laser&Otpoelectronics,College of Precision Instruments and Opto-Electronic Engineering,Key Laboratory of Opto-electronics Information and Technical Science(Ministry of Education),Tianjin University,Tianjin 300072 [2]Hebei Key Laboratory of Optoelectronic Information and Geo-detection Technology,Shijiazhuang University of Economics,Shijiazhuang 050031 [3]The College of Gems and Materials Technology,Shijiazhuang University of Economics,Shijiazhuang 050031

出　　处：《Chinese Physics Letters》2012年第2期89-92,共4页中国物理快报（英文版）

基　　金：Supported by the National Basic Research Program of China under Grant No 2010CB327801;the Key Program of National Natural Science Foundation of China under Grant No 60637010;THE Natural Science Research Project in University of Hebei Province under Grant No Z2010163.

摘　　要：The three-dimensional thermal properties of 18-core photonic crystal fiber lasers operated under natural convection are investigated.The temperature sensing technique based on a fiber Bragg grating sensor array is proposed to measure the longitudinal temperature distribution of a 1.6-m-long ytterbium-doped 18-core photonic crystal fiber.The results show that the temperature decreases from the pump end to the launch end exponentially.Moreover,the radial temperature distribution of the fiber end is investigated by using the full-vector finite-element method.The numerical results match well with the experimental data and the coating temperature reaches 422.7K,approaching the critical value of polymer cladding,when the pumping power is 40 W.Therefore the fiber end cooling is necessary to achieve power scaling.Compared with natural convection methods,the copper cooling scheme is found to be an effective method to reduce the fiber temperature.

关 键 词：FIBER PUMPING PUMP 

分 类 号：TN2[电子电信—物理电子学]